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package protocol
import (
"github.com/fatih/color"
j "github.com/json-iterator/go"
"github.com/spiral/errors"
"github.com/spiral/roadrunner/v2/pkg/payload"
"github.com/spiral/roadrunner/v2/plugins/logger"
"go.temporal.io/api/common/v1"
"go.temporal.io/api/failure/v1"
)
var json = j.ConfigCompatibleWithStandardLibrary
// JSONCodec can be used for debugging and log capturing reasons.
type JSONCodec struct {
// level enables verbose logging or all incoming and outcoming messages.
level DebugLevel
// logger renders messages when debug enabled.
logger logger.Logger
}
// jsonFrame contains message command in binary form.
type jsonFrame struct {
// ID contains ID of the command, response or error.
ID uint64 `json:"id"`
// Command name. Optional.
Command string `json:"command,omitempty"`
// Options to be unmarshalled to body (raw payload).
Options j.RawMessage `json:"options,omitempty"`
// Failure associated with command id.
Failure []byte `json:"failure,omitempty"`
// Payloads specific to the command or result.
Payloads []byte `json:"payloads,omitempty"`
}
// NewJSONCodec creates new Json communication codec.
func NewJSONCodec(level DebugLevel, logger logger.Logger) Codec {
return &JSONCodec{
level: level,
logger: logger,
}
}
// WithLogger creates new codes instance with attached logger.
func (c *JSONCodec) WithLogger(logger logger.Logger) Codec {
return &JSONCodec{
level: c.level,
logger: logger,
}
}
// GetName returns codec name.
func (c *JSONCodec) GetName() string {
return "json"
}
// Execute exchanges commands with worker.
func (c *JSONCodec) Execute(e Endpoint, ctx Context, msg ...Message) ([]Message, error) {
const op = errors.Op("json_codec_execute")
if len(msg) == 0 {
return nil, nil
}
var response = make([]jsonFrame, 0, 5)
var result = make([]Message, 0, 5)
var err error
frames := make([]jsonFrame, 0, len(msg))
for _, m := range msg {
frame, err := c.packFrame(m)
if err != nil {
return nil, errors.E(op, err)
}
frames = append(frames, frame)
}
p := payload.Payload{}
if ctx.IsEmpty() {
p.Context = []byte("null")
}
p.Context, err = json.Marshal(ctx)
if err != nil {
return nil, errors.E(op, err)
}
p.Body, err = json.Marshal(frames)
if err != nil {
return nil, errors.E(op, err)
}
if c.level >= DebugNormal {
logMessage := string(p.Body) + " " + string(p.Context)
if c.level >= DebugHumanized {
logMessage = color.GreenString(logMessage)
}
c.logger.Debug(logMessage)
}
out, err := e.Exec(p)
if err != nil {
return nil, errors.E(op, err)
}
if len(out.Body) == 0 {
// worker inactive or closed
return nil, nil
}
if c.level >= DebugNormal {
logMessage := string(out.Body)
if c.level >= DebugHumanized {
logMessage = color.HiYellowString(logMessage)
}
c.logger.Debug(logMessage, "receive", true)
}
err = json.Unmarshal(out.Body, &response)
if err != nil {
return nil, errors.E(op, err)
}
for _, f := range response {
msg, err := c.parseFrame(f)
if err != nil {
return nil, errors.E(op, err)
}
result = append(result, msg)
}
return result, nil
}
func (c *JSONCodec) packFrame(msg Message) (jsonFrame, error) {
var (
err error
frame jsonFrame
)
frame.ID = msg.ID
if msg.Payloads != nil {
frame.Payloads, err = msg.Payloads.Marshal()
if err != nil {
return jsonFrame{}, err
}
}
if msg.Failure != nil {
frame.Failure, err = msg.Failure.Marshal()
if err != nil {
return jsonFrame{}, err
}
}
if msg.Command == nil {
return frame, nil
}
frame.Command, err = commandName(msg.Command)
if err != nil {
return jsonFrame{}, err
}
frame.Options, err = json.Marshal(msg.Command)
if err != nil {
return jsonFrame{}, err
}
return frame, nil
}
func (c *JSONCodec) parseFrame(frame jsonFrame) (Message, error) {
var (
err error
msg Message
)
msg.ID = frame.ID
if frame.Payloads != nil {
msg.Payloads = &common.Payloads{}
err = msg.Payloads.Unmarshal(frame.Payloads)
if err != nil {
return Message{}, err
}
}
if frame.Failure != nil {
msg.Failure = &failure.Failure{}
err = msg.Failure.Unmarshal(frame.Failure)
if err != nil {
return Message{}, err
}
}
if frame.Command != "" {
cmd, err := initCommand(frame.Command)
if err != nil {
return Message{}, err
}
err = json.Unmarshal(frame.Options, &cmd)
if err != nil {
return Message{}, err
}
msg.Command = cmd
}
return msg, nil
}
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